Recommendations on a rear gear ratio

jim_howard_pdx · 09-15-2002, 12:07 AM

Hi. My engine is a 351 Winsor, .30 over, forged pistons, balanced & blueprinted. Cam is 278 duration .478 intake and .498 exhaust. Running ported trick flow twisted wedge heads and RPM edelbrock manifold. I have a modified Holley 750 running annular front boosters and double downleg rear boosters. Last night I ran 13.9 et at 100 mph. I currently have 3.25 gears and a C-4 automatic with 1800 RPM stall converter.

I cross the quarter mile at about 3300 RPM in 3rd gear. I would like to use a rear end gear that will put me at 6,000 RPM in 3rd gear at end of the quarter mile.

Any suggestions on the right gear ratio. Any suggestions on a stall converter point to maximize launch? At 3,100 lbs, does anyone have a program to compute my rear wheel horsepower?

I am thinking 4.57 or 4.80 gears would be about right. But what are you guys running?

GodStang · 09-15-2002, 12:10 AM

Try using the Analyzer to the top left of the screen. It should help you with both of your questions.

09-15-2002, 12:07 AM	#1
jim_howard_pdx Registered Member Join Date: Apr 2002 Location: Portland Oregon Posts: 247	Recommendations on a rear gear ratio Hi. My engine is a 351 Winsor, .30 over, forged pistons, balanced & blueprinted. Cam is 278 duration .478 intake and .498 exhaust. Running ported trick flow twisted wedge heads and RPM edelbrock manifold. I have a modified Holley 750 running annular front boosters and double downleg rear boosters. Last night I ran 13.9 et at 100 mph. I currently have 3.25 gears and a C-4 automatic with 1800 RPM stall converter. I cross the quarter mile at about 3300 RPM in 3rd gear. I would like to use a rear end gear that will put me at 6,000 RPM in 3rd gear at end of the quarter mile. Any suggestions on the right gear ratio. Any suggestions on a stall converter point to maximize launch? At 3,100 lbs, does anyone have a program to compute my rear wheel horsepower? I am thinking 4.57 or 4.80 gears would be about right. But what are you guys running? __________________ 1966 Customized for daily street and highway domination. 358 Windsor running 425 HP C-4 Auto and 3.25 Posi

09-15-2002, 12:10 AM	#2
GodStang College Stanger Join Date: May 1999 Location: Aiken,south carolina, usa Posts: 1,097	Try using the Analyzer to the top left of the screen. It should help you with both of your questions. __________________ 2003 Sonic Blue Cobra

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